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EP0334357A3 - Pulse insertion circuit - Google Patents

Pulse insertion circuit Download PDF

Info

Publication number
EP0334357A3
EP0334357A3 EP19890105245 EP89105245A EP0334357A3 EP 0334357 A3 EP0334357 A3 EP 0334357A3 EP 19890105245 EP19890105245 EP 19890105245 EP 89105245 A EP89105245 A EP 89105245A EP 0334357 A3 EP0334357 A3 EP 0334357A3
Authority
EP
European Patent Office
Prior art keywords
data
input data
parallel
pulse
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890105245
Other languages
German (de)
French (fr)
Other versions
EP0334357B1 (en
EP0334357A2 (en
Inventor
Naonobu Fujimoto
Yukio Suda
Katsutoshi Miyaji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0334357A2 publication Critical patent/EP0334357A2/en
Publication of EP0334357A3 publication Critical patent/EP0334357A3/en
Application granted granted Critical
Publication of EP0334357B1 publication Critical patent/EP0334357B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/07—Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates or bit rates
    • H04J3/076—Bit and byte stuffing, e.g. SDH/PDH desynchronisers, bit-leaking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The pulse insertion circuit comprises a series to parallel converter (6) converting a series of input data to two parallel input data having a half clock frequency by distributing the series data alternately, a parallel type elastic memory (1) writing or reading the two parallel input data synchronously, a delay circuit (2) delaying one of the two parallel input data, a selector (3) selecting two data for two outputs from the two parallel input data and the delayed data, a control circuit (4) stopping a read clock signal of the elastic memory (1) for one clock period, and a pulse addition circuit (5) adding a pulse to the parallel data upon receipt of a pulse insertion request signal when the delayed data is selected or the read clock signal is stopped. By using this pulse insertion circuit, a pulse insertion necessary for multiplexing can be carried out with a circuitry adapted to operate at a half of a frequency of the series input data.
EP89105245A 1988-03-25 1989-03-23 Pulse insertion circuit Expired - Lifetime EP0334357B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63069336A JPH0644746B2 (en) 1988-03-25 1988-03-25 Parallel pulse insertion circuit
JP69336/88 1988-03-25

Publications (3)

Publication Number Publication Date
EP0334357A2 EP0334357A2 (en) 1989-09-27
EP0334357A3 true EP0334357A3 (en) 1992-03-04
EP0334357B1 EP0334357B1 (en) 1995-06-07

Family

ID=13399608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105245A Expired - Lifetime EP0334357B1 (en) 1988-03-25 1989-03-23 Pulse insertion circuit

Country Status (5)

Country Link
US (1) US5014271A (en)
EP (1) EP0334357B1 (en)
JP (1) JPH0644746B2 (en)
CA (1) CA1317379C (en)
DE (1) DE68922930T2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359605A (en) * 1989-06-22 1994-10-25 U.S. Philips Corporation Circuit arrangement for adjusting the bit rates of two signals
FR2656479B1 (en) * 1989-12-27 1994-04-08 Alcatel Cit
US5287360A (en) * 1989-12-27 1994-02-15 Alcatel Cit Device for inserting information bits into a specific frame structure
GB9008932D0 (en) * 1990-04-20 1990-06-20 British Broadcasting Corp Synchronisation of digital audio signals
US5111485A (en) * 1990-05-18 1992-05-05 Northern Telecom Limited Method of and circuit for synchronizing data
AU642590B2 (en) * 1991-03-15 1993-10-21 Nec Corporation Method and circuit for demultiplexing digital signals capable of absorbing destuffing jitter
FR2675924B1 (en) * 1991-04-25 1993-12-24 Innovatron Sa SYSTEM FOR EXCHANGING DATA BETWEEN AN ELECTRONIC OBJECT COUPLED TO A DISTINCT DATA-TRANSFER DEVICE, INSERABLE OBJECT AND CORRESPONDING TRANSFER DEVICE.
US5426633A (en) * 1992-06-02 1995-06-20 Nec Corporation System for processing synchronization signals with phase synchronization in a mobile communication network
US5200982A (en) * 1991-10-02 1993-04-06 Alcatel Network Systems, Inc. In-line piece-wise linear desynchronizer
US5353313A (en) * 1992-04-10 1994-10-04 At&T Bell Laboratories Transmission of a clock signal over an asynchronous data channel
US5327126A (en) * 1992-06-26 1994-07-05 Hewlett-Packard Company Apparatus for and method of parallel justifying and dejustifying data in accordance with a predetermined mapping
US5285206A (en) * 1992-08-25 1994-02-08 Alcatel Network Systems, Inc. Phase detector for elastic store
US5535218A (en) * 1994-06-03 1996-07-09 Transwitch Corporation Apparatus and method for limiting jitter in a telecommunications signal which is being mapped in another such signal by temporarily suspending measurement of available data
US5528598A (en) * 1994-06-03 1996-06-18 Transwitch Corporation Apparatus and method for limiting jitter in a telecommunications signal
DE69529565T2 (en) * 1994-06-03 2003-11-20 Transwitch Corp., Shelton DEVICE AND METHOD FOR LIMITING JITTERS IN A MESSAGE TRANSMISSION SIGNAL
US5872823A (en) * 1997-04-02 1999-02-16 Sutton; Todd R. Reliable switching between data sources in a synchronous communication system
JPH10327158A (en) * 1997-05-23 1998-12-08 Oki Electric Ind Co Ltd Clock reproducing device
US10775489B2 (en) * 2016-12-15 2020-09-15 Texas Instruments Incorporated Maximum measurable velocity in frequency modulated continuous wave (FMCW) radar

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5797247A (en) * 1980-12-09 1982-06-16 Fujitsu Ltd Stuff control system
US4580279A (en) * 1984-04-16 1986-04-01 At&T Bell Laboratories Elastic store slip control and maintenance circuit
DE3416610A1 (en) * 1984-05-05 1985-11-07 Philips Patentverwaltung Gmbh, 2000 Hamburg BUFFER MEMORY FOR AN INPUT LINE OF A DIGITAL SWITCHING CENTER
NZ220548A (en) * 1986-06-18 1990-05-28 Fujitsu Ltd Tdm frame synchronising circuit
JPH0728280B2 (en) * 1986-10-17 1995-03-29 富士通株式会社 Multiplex multiframe sync detection circuit
US4730346A (en) * 1987-02-12 1988-03-08 Dallas Semiconductor Corporation Method and apparatus for extracting a predetermined bit pattern from a serial bit stream
US4791652A (en) * 1987-06-04 1988-12-13 Northern Telecom Limited Synchronization of asynchronous data signals

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ELECTRICAL COMMUNICATION. vol. 57, no. 3, 1982, HEIDESHEIM DE pages 251 - 258; A. BARBETTA ET AL: 'Digital Multiplexers for Rates from 2 to 565Mbits/s' *
IEEE COMMUNICATIONS MAGAZINE. vol. 24, no. 8, August 1986, US pages 17 - 25; B. FLEURY: 'Asynchronous High Speed Digital Multiplexing' *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 356 (E-459)(2412) 29 November 1986 & JP-A-61 154 238 ( NEC ) 12 July 1986 *
PROCEEDINGS, IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, 1-4 DEC. 1986 vol. 2, HOUSTON US pages 1200 - 1204; N. YOSHIKAI ET AL: 'Very-High-Speed Line Terminating Multiplexer Operating up to Multi-Gbit/Sec' *

Also Published As

Publication number Publication date
DE68922930T2 (en) 1995-12-14
JPH01243632A (en) 1989-09-28
US5014271A (en) 1991-05-07
EP0334357B1 (en) 1995-06-07
JPH0644746B2 (en) 1994-06-08
EP0334357A2 (en) 1989-09-27
CA1317379C (en) 1993-05-04
DE68922930D1 (en) 1995-07-13

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